CN214747781U - Laser displacement detection device - Google Patents
Laser displacement detection device Download PDFInfo
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- CN214747781U CN214747781U CN202120914121.2U CN202120914121U CN214747781U CN 214747781 U CN214747781 U CN 214747781U CN 202120914121 U CN202120914121 U CN 202120914121U CN 214747781 U CN214747781 U CN 214747781U
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- laser displacement
- displacement sensor
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 106
- 238000001514 detection method Methods 0.000 title claims abstract description 61
- 239000000126 substance Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 9
- 238000005259 measurement Methods 0.000 description 5
- 238000000691 measurement method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
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- 238000004519 manufacturing process Methods 0.000 description 1
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Abstract
The utility model provides a laser displacement detection device, which comprises a laser displacement sensor, a grid body component, an object to be detected and a control module; the laser displacement sensor moves along with the object to be detected; the laser displacement sensor is positioned above the grid body assembly; the grid body assembly comprises a plurality of mechanical grid bodies which are uniformly distributed, and incident laser emitted by the laser displacement sensor is obliquely incident on the mechanical grid bodies; the laser displacement sensor and the object to be detected are in signal connection with the control module. The utility model provides a laser displacement detection device sets up laser displacement sensor into the form that removes along with the object that awaits measuring, combines evenly distributed's mechanical bars body, and the quantity of the mechanical bars body through statistics object that awaits measuring removes the in-process, again according to laser displacement sensor at the current position, can obtain the displacement of the object that awaits measuring, can realize the laser detection to long stroke displacement.
Description
Technical Field
The utility model relates to a laser survey technical field particularly, relates to a laser displacement detection device.
Background
In the processing and manufacturing industry, the laser displacement sensor can realize high-precision, high-efficiency and non-contact detection, and can also realize precise stroke control after feedback is added. However, each high-precision laser displacement sensor has certain maximum detection stroke limitation, so that long-stroke displacement detection has certain difficulty.
SUMMERY OF THE UTILITY MODEL
The utility model provides a problem be that present laser displacement sensor is difficult to carry out the accurate detection to long stroke displacement.
In order to solve the above problems, the present invention provides a laser displacement detection device, which comprises a laser displacement sensor, a grid assembly, an object to be detected, and a control module; wherein the content of the first and second substances,
the laser displacement sensor moves along with the object to be detected; the laser displacement sensor is positioned above the grid body assembly;
the grid body assembly comprises a plurality of mechanical grid bodies which are uniformly distributed, and incident laser emitted by the laser displacement sensor is obliquely incident on the mechanical grid bodies;
the laser displacement sensor and the object to be detected are in signal connection with the control module.
Optionally, the distance L between adjacent mechanical grids, the height of the mechanical grid, and the included angle α between the incident laser and the horizontal plane satisfy the following relationship:
H≥L.tanα。
optionally, the top end of the mechanical grating body includes a wedge-shaped surface, and an inclination direction of the wedge-shaped surface is consistent with an incident direction of the incident laser.
Optionally, a slope of the wedge-facet is not less than a slope of the incident laser light.
Optionally, the grid assembly further comprises a grid support, the mechanical grids are uniformly distributed on the grid support, and two ends of the grid support are connected with the object to be detected.
Optionally, the object to be tested comprises a single axis servo assembly.
Optionally, the single-shaft servo assembly comprises a servo support frame, a screw rod connected to the servo support frame, a moving nut arranged on the screw rod, and a servo drive motor connected to the screw rod; the laser displacement sensor is connected with the movable nut.
Optionally, the single-shaft servo assembly further comprises a guide rail, the guide rail is fixedly connected with the servo support frame, and the movable nut is slidably connected with the guide rail.
Optionally, the number of the guide rails is two, and the two guide rails are respectively located on two sides of the screw rod.
Compared with the prior art, the utility model provides a laser displacement detection device has following advantage:
the utility model provides a laser displacement detection device compares with traditional laser displacement detection, sets up laser displacement sensor into the form that moves along with the object to be measured, combines the mechanical bars body of evenly distributed simultaneously, through the quantity of the mechanical bars body of statistics process that the object to be measured moved, again according to laser displacement sensor at the current position, the detection displacement volume that is in its self detection stroke within range that detects, can obtain the displacement of the object to be measured; the detection stroke of the laser displacement detection device is not limited by the maximum detection stroke of the laser displacement sensor, so that the laser detection of long-stroke displacement can be realized.
Drawings
FIG. 1 is a schematic view of a laser displacement detecting device according to the present invention;
FIG. 2 is a schematic diagram of the middle laser displacement detecting device according to the present invention;
fig. 3 is a partially enlarged view of a portion a in fig. 1.
Description of reference numerals:
1-a laser displacement sensor; 2-a gate assembly; 21-a mechanical grid body; 211-wedge faces; 22-a grid support; 3-an object to be measured; 31-a servo support frame; 32-a lead screw; 33-moving the nut; 34-a servo drive motor; 35-guide rail.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention, and all other embodiments obtained by those skilled in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used merely for the purpose of simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
In the present disclosure, unless otherwise expressly stated or limited, a first feature "on" or "under" a first feature may comprise the first feature and a second feature in direct contact, or may comprise the first feature and the second feature not in direct contact but in contact with each other through another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. The first feature being "under," "below," and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or merely indicates that the first feature is at a lower level than the second feature.
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.
The existing laser displacement detection method mainly comprises a laser echo measuring method and a triangulation method; the triangulation method has high measurement accuracy, but the measurement stroke is limited, so that the method is difficult to be used for displacement detection of long stroke; therefore, the existing long-stroke displacement measurement and control mostly adopts a laser echo measurement method, but the measurement precision of the measurement method is poor, and the measurement precision of micron order cannot be achieved.
In order to solve the problem that the existing laser displacement sensor is difficult to accurately detect the long-stroke displacement, the utility model provides a laser displacement detection device, which is shown in the figures 1 and 2 and comprises a laser displacement sensor 1, a grid body component 2, an object to be detected 3 and a control module; the object 3 to be detected is an object needing to detect displacement; for convenience of understanding, the present application takes the object 3 to be measured as a single-axis servo assembly as an example for description; in order to ensure the detection precision, the laser displacement sensor 1 is preferably a high-precision laser displacement sensor; the laser displacement sensor 1 moves along with the object 3 to be measured; the laser displacement sensor 1 is positioned above the grid body component 2; the grid body component 2 comprises a plurality of mechanical grid bodies 21 which are uniformly distributed, and incident laser emitted by the laser displacement sensor 1 is obliquely incident on the mechanical grid bodies 21; the laser displacement sensor 1 and the object to be detected 3 are in signal connection with the control module.
The control module preferably comprises a PLC controller and a computer control system connected with the PLC controller; the PLC is in signal connection with the laser displacement sensor 1 and is used for acquiring detection information of the laser displacement sensor 1 and transmitting the acquired detection information to the computer control system, and the computer control system further acquires displacement of the object to be detected 3 according to the detection information and controls the object to be detected 3.
The plurality of mechanical grid bodies 21 uniformly distributed in the application specifically means that the structures of the mechanical grid bodies 21 are the same, and the distances between the adjacent mechanical grid bodies 21 are the same.
When the displacement of the object to be detected 3 is detected, the laser displacement sensor 1 moves along with the object to be detected 3, and incident laser emitted by the laser displacement sensor 1 also moves together; because the incident laser is incident on the mechanical grid body 21, namely the detection point of the laser displacement sensor 3 is always on the mechanical grid body 21 and moves along with the object 3 to be detected; when the object 3 to be detected moves a certain distance, the detection point moves from the previous mechanical grid body 21 to the next mechanical grid body 21 adjacent to the previous mechanical grid body; when a detection point moves from a previous mechanical grid body 21 to a next mechanical grid body 21, the displacement information detected by the laser displacement sensor 1 jumps in value; the number of times of jumping of the numerical value through the control module can obtain the number of the mechanical grid bodies 21 through which the incident laser of the laser displacement sensor 1 passes in the moving process of the object 3 to be detected; further, the displacement information of the object 3 to be measured can be obtained according to the number of the mechanical grid bodies 21 passing by, the distance between the adjacent mechanical grid bodies 21, and the displacement information detected by the laser displacement sensor 1 at the current position.
The utility model provides a laser displacement detection device compares with traditional laser displacement detection, sets up laser displacement sensor 1 into the form that moves along with the object 3 that awaits measuring, combines the mechanical bars body 21 of evenly distributed simultaneously, through the quantity of the mechanical bars body 21 that the statistics object 3 that awaits measuring passed through in the removal process, according to laser displacement sensor 1 at the current position again, the detection displacement volume that is in its self detection stroke scope that detects, can obtain the displacement of the object 3 that awaits measuring; the detection stroke of the laser displacement detection device is not limited by the maximum detection stroke of the laser displacement sensor 1, so that the laser detection of long-stroke displacement can be realized.
Meanwhile, the laser displacement detection device can realize the detection of long-stroke displacement only by the existing high-precision laser displacement sensor 1 and combining with the common mechanical grating body 21 and the microprocessor signal processing technology without structures such as a high-precision grating and the like, and has the advantages of high detection precision, simple structure and low cost.
Further, in order to ensure the accuracy of the detection result, the detection point of the laser displacement sensor 1, i.e. the incident point of the incident laser, needs to be always located on the mechanical grid body 21; that is, with the movement of the object 3 to be measured, the incident point of the incident laser gradually moves upwards on a certain mechanical grid body 21, when the incident point moves upwards to the highest point of the mechanical grid body 21, the object 3 to be measured continues to move, and the incident point is immediately transferred to the next mechanical grid body 21 along the moving direction, and cannot fall into the area between two adjacent mechanical grid bodies 21; to meet the above requirements, referring to fig. 3, the distance L between adjacent mechanical grids 21 and the height of the mechanical grid 21, and the included angle α between the incident laser and the horizontal plane satisfy the following relationship: h ≧ l.tan α, and preferably H ═ l.tan α.
Because the mechanical grid body 21 has a certain thickness, in order to avoid that the accuracy of the detection result is affected due to the fact that the incident point moves at the top of the mechanical grid body 21 after the incident point of the incident laser reaches the top end of the mechanical grid body 21, the top end of the mechanical grid body 21 preferably comprises a wedge-shaped surface 211, and the inclination direction of the wedge-shaped surface 211 is consistent with the incident direction of the incident laser; that is, the top end face of the mechanical grating 21 is an inclined face, and the height of the end of the top end face close to the laser displacement sensor 1 is higher than the height of the end of the top end face far away from the laser displacement sensor 1, so that the retention time of the incident laser on the top end face of the mechanical grating 21 is reduced, and the detection accuracy and the detection sensitivity are improved.
Further, in the present application, it is preferable that the slope of the wedge-shaped surface 211 is not smaller than the slope of the incident laser, so as to avoid the detection point from staying at the top end face of the mechanical grid body 21, and further improve the accuracy and sensitivity of the detection.
In order to further improve the stability of the structure of the laser displacement detection device and the accuracy of the detection result, the grid assembly 2 in the application further comprises a grid support 22, a plurality of mechanical grids 21 are uniformly distributed on the grid support 22, and the two ends of the grid support 22 are further preferably connected with the object 3 to be detected.
The grid body supports 22 are used for fixing the mechanical grid bodies 21, so that the distance between the adjacent mechanical grid bodies 21 is kept constant, and the structural stability of the grid body assembly 2 is improved; the grid body support 22 is connected with the object 3 to be detected, so that the relative position relation between the grid body assembly 2 and the object 3 to be detected can be kept constant, and the accuracy and the stability of a detection result are improved.
The present application prefers that the object 3 to be measured comprises a single axis servo assembly.
Specifically, referring to fig. 1 to 2, the single-axis servo assembly includes a servo support frame 31, a screw rod 32 connected to the servo support frame 31, a moving nut 33 disposed on the screw rod 32, and a servo driving motor 34 connected to the screw rod 32, and the servo driving motor 34 drives the moving nut 33 to move along the screw rod 32; the laser displacement sensor 1 is connected to the moving nut 33 such that the laser displacement sensor 1 moves with the moving nut 33.
The servo support frame 31 is preferably located above the grid assembly 2, and the grid support 22 is connected to the bottom end of the servo support frame 31.
In the working process of the laser displacement detection device, the laser displacement sensor 1 moves along with the moving nut 33, so that incident laser emitted by the laser displacement sensor 1 sequentially moves on each mechanical grid body 21, and when the incident laser moves on different mechanical grid bodies 21, a detection value jumps; according to the number of vertical jumps, the distance between adjacent mechanical grid bodies 21 and the current displacement detection value of the laser displacement sensor 1, the displacement of any stroke can be obtained.
In order to further improve the stability of the laser displacement detection device, the preferred single-shaft servo assembly of the present application further includes a guide rail 35, the guide rail 35 is fixedly connected with the servo support frame 31, and the movable nut 33 is slidably connected with the guide rail 35; it is further preferred that the number of the guide rails 35 is two, and the two guide rails 35 are respectively located at both sides of the screw shaft 32.
Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure, and such changes and modifications will fall within the scope of the present invention.
Claims (9)
1. The laser displacement detection device is characterized by comprising a laser displacement sensor (1), a grid body assembly (2), an object to be detected (3) and a control module; wherein the content of the first and second substances,
the laser displacement sensor (1) moves along with the object (3) to be detected; the laser displacement sensor (1) is positioned above the grid body assembly (2);
the grid body assembly (2) comprises a plurality of mechanical grid bodies (21) which are uniformly distributed, and incident laser emitted by the laser displacement sensor (1) is obliquely incident on the mechanical grid bodies (21);
the laser displacement sensor (1) and the object to be detected (3) are in signal connection with the control module.
2. The laser displacement detection device according to claim 1, wherein a distance L between adjacent mechanical grating bodies (21) and a height of the mechanical grating bodies (21) and an included angle α between the incident laser and a horizontal plane satisfy the following relationship:
H≥L.tanα。
3. the laser displacement sensing device according to claim 1, wherein the tip of the mechanical grating (21) comprises a wedge-shaped facet (211), and the direction of inclination of the wedge-shaped facet (211) coincides with the incident direction of the incident laser light.
4. The laser displacement sensing device of claim 3, wherein a slope of the wedge facet (211) is not less than a slope of the incident laser light.
5. The laser displacement detection device according to any one of claims 1 to 4, wherein the grid assembly (2) further comprises a grid support (22), a plurality of mechanical grids (21) are uniformly distributed on the grid support (22), and two ends of the grid support (22) are connected with the object (3) to be detected.
6. The laser displacement detection device according to claim 5, characterized in that the object (3) to be measured comprises a single-axis servo assembly.
7. The laser displacement detection device according to claim 6, wherein the single-shaft servo assembly comprises a servo support frame (31), a lead screw (32) connected to the servo support frame (31), a moving nut (33) arranged on the lead screw (32), and a servo drive motor (34) connected to the lead screw (32); the laser displacement sensor (1) is connected with the movable nut (33).
8. The laser displacement sensing device of claim 7, wherein the single-axis servo assembly further comprises a guide rail (35), the guide rail (35) is fixedly connected with the servo support frame (31), and the moving nut (33) is slidably connected with the guide rail (35).
9. The laser displacement detection device according to claim 8, wherein the number of the guide rails (35) is two, and the two guide rails (35) are respectively located on both sides of the lead screw (32).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120914121.2U CN214747781U (en) | 2021-04-29 | 2021-04-29 | Laser displacement detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120914121.2U CN214747781U (en) | 2021-04-29 | 2021-04-29 | Laser displacement detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214747781U true CN214747781U (en) | 2021-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120914121.2U Expired - Fee Related CN214747781U (en) | 2021-04-29 | 2021-04-29 | Laser displacement detection device |
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| Country | Link |
|---|---|
| CN (1) | CN214747781U (en) |
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2021
- 2021-04-29 CN CN202120914121.2U patent/CN214747781U/en not_active Expired - Fee Related
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Granted publication date: 20211116 |
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